class A:
pass
def dump(self, symbol, number):
print(symbol, number)
setattr(A, 'dump', dump)
b = A()
b.dump('a', 'b')
Y2xhc3MgQToKCXBhc3MKIApkZWYgZHVtcChzZWxmLCBzeW1ib2wsIG51bWJlcik6CglwcmludChzeW1ib2wsIG51bWJlcikKIApzZXRhdHRyKEEsICdkdW1wJywgZHVtcCkKCmIgPSBBKCkKYi5kdW1wKCdhJywgJ2InKQ==